klaber



(No Model); v

A; D. KLABER.

ENVELOPE.

No 532,206. Patented Jan. 8, 1895.

' siding at Brooklyn, in the county of Kings,

U lT- D 1 TATES P T F QE AUGUSTUS. D. KL'ABER, orssooigLrmwAssienon TOTHE NEOSTYLE COMPANY, OF NEW YORK, N. Y.

-ENVEl OPE.

SPECIFICATION forming part of Letters Patent No. 532,206, dated January8, 1895.

' Application fi March 7,1894. Serial No. 502,609. (No model.)

To all whom, it mag concern:

Be it known that I, AUGUSTUS D. KLABER, a subject of the Queen of GreatBritain, re-

State of New York, have invented a certain new and useful Improvement inEnvelopes, of which the following is a specification.

My invention relates to an improvement in envelopes and consistsessentially in an envelope whose edges are folded in the ordinary mannerso that when a portion of the top flap has been secured upon the bottomflap and one of-the side flaps the article will have the appearance ofthe ordinary sealed envelope,

yet will be capable of being opened without tearing or cutting. This isespecially desir able in envelopes designed to inclose matter fortransmission through the mail. As is well known, the rate of postageupon sealed communications is considerably in excess -of that upon opencommunications wherein an envelope is used having a flap which may beopened at will. A great objection to the latter is that ordinarily ithas the-conventional appearance of an envelope designed to containprinted advertising matter and such communications are frequently thrownaside as undeserving of consideration. A further objection is that theyare liable to become opened during transmission through the mail. Whilethis objection is not common to all envelopes of this kind, it is alwayspresent in those capable of manufacture at small expense. Thus,envelopes having an inadhesive flap have been used but it has been foundnecessary to detachably secure the flap in place by means of a metallicclasp or a string passingaround a disk. These forms can be produced onlyat considerable expense and are still objectionable inasmuch as theyhave not the appearance of a sealed envelope which, as has been shown,is desirable.

The object of the present invention, therefore, is to produce anenvelope at very small cost, which may be readily opened, which shallclosely resemble the ordinary sealed envelope in appearance and whichshall securely inclose the matter placed within it.

In the drawings, Figure 1 is a view of an envelope blank ready to befolded. Fig. 2 is a similar view, the bottom flap and one side flapbeing folded and secured in position and theenvelope being ready toreceive its contents. Fig. 3 is a similar view showing the envelopeclosed and ready for mailing.

Referring to the drawings, in which similar letters of reference denotecorresponding parts, A designates a sheet of paper provided with a topflap B, a bottom flap C and side These sheets may be cut and folded inlarge quantities by machinery in the customary manner. As here shown,the flaps B, O, E, are approximately pointed at their free ends. This,however, is entirely a matter of taste and the form may be varied in anysuitable respect. The flap D may be of any desired form. It should,however, be

sufficiently large to cover the space between the edges of the top andbottom flaps left open by their pointed form.

'In an ordinary envelope, it is customary to provide both the top andbottom flaps with mucilage in order that the latter will hold the sideflaps in position and that after the inclosure the former may bemoistened and secured upon all three. In the present invention, however,but one side of each of the top and bottom flaps is provided with anadhesive substance, as shown at b c. This'substance is preferablyapplied during the manufacture of the envelope and the flap E is foldedupon the sheet and secured by the folding up of the bottom flap C asshown in Fig. 2. The flap D is folded in a manner similar to the foldingof flap E but is not gummed. Its edge is turned in beneath the edge ofthe flap 0. The envelope is now ready for the market. When it is desiredto use the envelope, the inclosure is placed within it in the usualmanner, the mucilage or other adhesive substance I) is moistened and thetop flap folded in position and secured, as shown in Fig. 3. It isdifficult now to distinguish the envelope from placed upon the outsideof the side flap E en-- tirely and none placed upon the top orbotsubstantially as described. tom flap. This is whollya matter ofconven- This specification signed and witnessed this ience. 6th day ofMarch, 1894. 5 I claim- An envelope having a top flap, a bottomWitnesses: flap and two side flaps, said top and bottom flaps beingprovided with an adhesive sub- AUGUSTUS D. KLABER.

S. 0. EDMONDS,

W. PELZER.

stance on oneside of their inner surface only,

